I have always said that the readers of my blog are smarter and better informed than I am, how about we deduce what the safe water temperature for a 10k-swim should be?
I figured the Navy would be the place to look for info on heat stroke and warm water deaths but I could not find anything. Consequently it is my belief that we have to use FINA's maximum pool temp as a benchmark but then minus 7-degrees from that temp as an ad hoc, temporary, benchmark.
Here is why: I learned that saltwater is more "insulated" so to speak than fresh water for ocean water will only freeze at 25-degrees Fahrenheit versus the 32-degrees Fahrenheit needed for "normal" water to freeze.
My deduction, based on this benchmark, is that ocean water feels 7-degrees warmer than fresh water. Ergo, by deducting 7-degrees off the FINA 82-degree maximum pool temperature benchmark; (No one has died of heatstroke in a pool), and make a bold statement that swimming in 75-degree water should be safe in sub 90-degree temps. We have a safe rule for swimmers to use when asked to compete in sketchy conditions.
Please correct me if I am wrong.